Colorful flowers

I am trying to find out if the color of a light bulb on a plant affects its growth.

Broad Question

How does the color of a light bulb affect a plants growth?

Specific Question

Does a red, grow, or clear light bulb affect the way a rye grass grows in height?

Hypothesis

The plant in the clear light bulb will grow the best. This is because it has direct light. The red light plant will grow the least because the bulb is coated in a thin red paint.

Graph of Hypothesis

Variables

Controlled variable:
the pant in the natural light

Independent Variable:

the color of the light

Dependent Variable:

the height of the plant

Variables That Need To Be Controlled:

the plant that is in the regular lightbulb

Vocabulary List That Needs Explanation

Germination
Photosynthesis
Best conditions for germination and growth of rye

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General Plan

• Where will you conduct this experiment? If not at school where are you going to put your experiment so that it doesn't bother anyone, you can assure it won't be disrupted by pets or babies, and it will be safe from changes in temperature or movement?
• What will you actually be doing? For example, measuring something, timing something...
• What are some potential problems you may encounter and how will you solve them?
• What are the safety and environmental concerns?

Potential Problems And Solutions

Safety Or Environmental Concerns

Experimental Design

(add the correct headings from the experimental design page before beginning)

Resources and Budget Table

Make this a list of ingredients

Item	Number needed	Where I will get this	Cost
soil	2 cups	already have it

Detailed Procedure

1. fill a cup with 3 cups of dirt.
2. plant the seed in the dirt
3. put the cups in direct light from the colored light bulb
4. measure how big the plant grows every day for a large amount of time
5. record how much the plant has grown and compare the data.

Diagram

Photo List

Time Line

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Data Table

red	natural	grow	incandescent
0	0	0	2

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Data Analysis

All Raw Data

Colorful flowers Controlled variable: the flower in the sun in the east window
Day 1:

• Planted 3 seeds in each of the 12 pots and put them under different colored lights
• Placed 3 pots in the east window covered with a clear plastic to promote photosynthesis.
• 3 plants were placed under a grow light using same process.
• 3 more plants were placed under an 85 watt red light using the same process.
• Then 3 more plants were placed under a regular 100 watt light bulb using the same process.

Day 2:

• Natural light (east window) has some condensation but no show of growth.
• Under the grow light, there is a lot of condensation and no show of growth.
• Under the red light there is a lot of condensation but still no sign of growth.
• Under the regular light, there is a lot of condensation and no show of growth.

Day 3:

• Natural Light: same case as the blue light.
• Grow Light: has little sprouts that are unmeasurable.
• Red Light: no growth at all.
• Regular Light: 4 sprouts one as tall as 2 cm.

Day 4:

• Natural light: has good growth and has plants as tall as 3.5 cm.
• Grow light: good progress some as tall as 4 cm.
• Red light: no progress at all so far.
• Regular light: good progress some as tall as 5 cm.
• Watered the plants today.

Day 5:

• Natural light:good growth some as tall as 8 cm
• Grow light: good growth some as tall as 7 cm
• Red light: little sprouts are forming, unmeasurable
• Regular light: good growth soma as tall as 9 cm.

Day 6:

• Natural light: good growth some as tall as 15 cm little leaves are sprouting
• Grow light: good growth some as tall as 12 cm little leaves are sprouting
• Red light: some growth show the only sprout is 7 cm
• Regular light: good growth some as tall as 13 cm. little leaves are sprouting
• watered today

Day 7:

• Natural light: good growth some as tall as 16 cm
• Grow light: good growth some as tall as 14 cm
• Red light: okay growth the only sprout is 9cm tall
• Regular light: good growth some as tall as 14 cm

Day 8:

• Natural light: good growth some as tall as 20 cm
• Grow light: good growth some as tall as 16 cm
• Red light: good growth the only sprout is 14 cm tall
• Regular light: no growth from yesterday
• watered today

Day 9:

• Natural light: good growth some as tall as 23 cm
• Grow light: believe it or not the plant is now 15 cm
• Red light: grew 1 cm so it is now 16 cm
• Regular light: is now 15 cm

Day 10:

• Natural light: 24cm
• grow light: 18 cm
• red light: 18 cm
• regular light: 19cm

Day 11:

• Natural light: 24cm
• Grow light: 20cm
• Red light: 20 cm. this gets dry the fastest
• Regular light: 23 cm
• watered today

Graphs

Photos

Results

Conclusion

Discussion

Benefit to Community and/or Science

Background Research

Blue Light:
The visible blue light has a wavelength of about 475 nm. Because the blue wavelengths are shorter in the visible spectrum, they are scattered more efficiently by the molecules in the atmosphere. This causes the sky to appear blue.


Red Light
The visible red light has a wavelength of about 650 nm. At sunrise and sunset, red or orange colors are present because the wavelengths associated with these colors are less efficiently scattered by the atmosphere than the shorter wavelength colors (e.g., blue and purple). A large amount of blue and violet light has been removed as a result of scattering and the longwave colors, such as red and orange, are more readily seen.
Yellow Light
The visible yellow light has a wavelength of about 570 nm. Low-pressure sodium lamps, like those used in some parking lots, emit a yellow (wavelength 589 nm) light.
Natural Light
Sunlight, which for the moment we'll consider to be visible white-colored light, is actually made up of many, many different wavelengths (colors) of light. Yes, a wavelength of light corresponds to its color, and a mixture of all the visible colors of light produces white light.
Blue light is a shorter wavelength, green and yellow are medium wavelengths, and red light is a longer wavelength. Ultraviolet, which is invisible, is very short wavelength light, while infrared, also invisible, is very long wavelength light. Sunlight contains these invisible lights as well as the visible colored lights.

References

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